Today our knowledge of food and what it does for our body is far more advanced than _____the old tim

Today our knowledge of food and what it does for our body is far more advanced than _____the old tim

题目
Today our knowledge of food and what it does for our body is far more advanced than _____the old time.
A.不填.B.those C.that of D.this of
为什么不能选A?
答案
Cthat来代替前面的东西,比较的对象是现在我们对食物的了解和过去我们对食物的了解.而不是现在我们对食物的了解和过去这个时间.这种用法比较常见:The weather in Beijing is colder than that of Shanghai.The number...
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